I have a Windows Small Business Server 2003 with Outlook Web Access enabled. I'm certain that the delivery of mail is working just fine. However, when clients access the Exange server via OWA (using IE) they get (at times) "blue boxes" around all of the buttons and a larger solid blue box below the bottom reading pane. This larger blue box pushes the reading of the messages upwards and makes reading them almost impossible - you have to scroll through the e-mail where only half of the letter is showing @ a time.
I've ran/installed all Windows updates for XP (including XP SP2) - my browser is also the latest version. I've also tried using Mozilla to access OWA and it seems better. However, I'm not sure that Mozilla supports the reading pane function so it may not be a fair test. Using Mozilla the "blue boxes" around the buttons don't show up though... I've also tried accessing the website via a Remote Desktop connection (from one of my other clients on SBS 2003) and it seems to work fine. It almost seems like a browser incompatibility? Anyway, I've tried almost every other aveneue for support and have come up empty. Any help is greatly appreciated!